Add Korean translation (#504)

* Add korean translation

* Remove fuzzy

* Fix awkward translations

* Update django_celery_beat/locale/ko/LC_MESSAGES/django.po

Co-authored-by: Lee Ho Sung <[email protected]>

* Update django_celery_beat/locale/ko/LC_MESSAGES/django.po

Co-authored-by: Lee Ho Sung <[email protected]>

* Follow Korean foreign language translation guideline

Co-authored-by: Asif Saif Uddin <[email protected]>
Co-authored-by: Lee Ho Sung <[email protected]>

Author: 3 people